Using the method of u-substitution,

where

u = 3x-7 (enter a function of x)

du = 3 dx (enter a function of x)

a = 2 (enter a number)

b = 5 (enter a number)

f(u) = __________(enter a function of u).

The value of the original integral is____________

so how would i know f(u) and please show steps and explain. so i can understand